diff --git a/core/modules/config/config.info.yml b/core/modules/config/config.info.yml
index 88821ce..3381f65 100644
--- a/core/modules/config/config.info.yml
+++ b/core/modules/config/config.info.yml
@@ -4,4 +4,4 @@ description: 'Allows administrators to manage configuration changes.'
 package: Core
 version: VERSION
 core: 8.x
-configure: config.sync
+configure: config.import_full
diff --git a/core/modules/config/config.links.menu.yml b/core/modules/config/config.links.menu.yml
index 87a9b92..c055d2a 100644
--- a/core/modules/config/config.links.menu.yml
+++ b/core/modules/config/config.links.menu.yml
@@ -1,5 +1,5 @@
-config.sync:
+config.import_full:
   title: 'Configuration management'
-  description: 'Import, export, or synchronize your site configuration.'
-  route_name: config.sync
+  description: 'Import or export your site configuration.'
+  route_name: config.import_full
   parent: system.admin_config_development
diff --git a/core/modules/config/config.links.task.yml b/core/modules/config/config.links.task.yml
index 5a894f0..968c563 100644
--- a/core/modules/config/config.links.task.yml
+++ b/core/modules/config/config.links.task.yml
@@ -1,34 +1,29 @@
-config.sync:
-  route_name: config.sync
-  base_route: config.sync
-  title: 'Synchronize'
-
-config.full:
+config.import:
   route_name: config.import_full
-  title: 'Full Import/Export'
-  base_route: config.sync
+  title: 'Import'
+  base_route: config.import
 
-config.single:
-  route_name: config.import_single
-  title: 'Single Import/Export'
-  base_route: config.sync
+config.export:
+  route_name: config.export_full
+  title: 'Export'
+  base_route: config.import
 
 config.export_full:
   route_name: config.export_full
-  title: Export
-  parent_id: config.full
+  title: Full
+  parent_id: config.export
 
 config.import_full:
   route_name: config.import_full
-  title: Import
-  parent_id: config.full
+  title: Full
+  parent_id: config.import
 
 config.export_single:
   route_name: config.export_single
-  title: Export
-  parent_id: config.single
+  title: Single
+  parent_id: config.export
 
 config.import_single:
   route_name: config.import_single
-  title: Import
-  parent_id: config.single
+  title: Single
+  parent_id: config.import
diff --git a/core/modules/config/config.module b/core/modules/config/config.module
index 3be5c49..c3fbcfb 100644
--- a/core/modules/config/config.module
+++ b/core/modules/config/config.module
@@ -20,9 +20,9 @@ function config_help($route_name, RouteMatchInterface $route_match) {
       )) . '</p>';
       return $output;
 
-    case 'config.sync':
+    case 'config.import_full':
       $output = '';
-      $output .= '<p>' . t('Import configuration that is placed in your staging directory. All changes, deletions, renames, and additions are listed below.') . '</p>';
+      $output .= '<p>' . t('Pellentesque sit amet sem et purus pretium consectetuer.') . '</p>';
       return $output;
 
     case 'config.import_full':
diff --git a/core/modules/config/config.permissions.yml b/core/modules/config/config.permissions.yml
index ee24216..5407f60 100644
--- a/core/modules/config/config.permissions.yml
+++ b/core/modules/config/config.permissions.yml
@@ -1,6 +1,3 @@
-synchronize configuration:
-  title: 'Synchronize configuration'
-  restrict access: true
 export configuration:
   title: 'Export configuration'
   restrict access: true
diff --git a/core/modules/config/config.routing.yml b/core/modules/config/config.routing.yml
index 8eebac3..d8a45ad 100644
--- a/core/modules/config/config.routing.yml
+++ b/core/modules/config/config.routing.yml
@@ -1,18 +1,10 @@
-config.sync:
-  path: '/admin/config/development/configuration'
-  defaults:
-    _form: '\Drupal\config\Form\ConfigSync'
-    _title: 'Synchronize'
-  requirements:
-    _permission: 'synchronize configuration'
-
 config.diff:
   path: '/admin/config/development/configuration/sync/diff/{source_name}/{target_name}'
   defaults:
     _controller: '\Drupal\config\Controller\ConfigController::diff'
     target_name: NULL
   requirements:
-    _permission: 'synchronize configuration'
+    _permission: 'import configuration'
 
 config.diff_collection:
   path: '/admin/config/development/configuration/sync/diff_collection/{collection}/{source_name}/{target_name}'
@@ -20,7 +12,7 @@ config.diff_collection:
     _controller: '\Drupal\config\Controller\ConfigController::diff'
     target_name: NULL
   requirements:
-    _permission: 'synchronize configuration'
+    _permission: 'import configuration'
 
 config.export_download:
   path: '/admin/config/development/configuration/full/export-download'
@@ -62,3 +54,11 @@ config.export_single:
     config_name: NULL
   requirements:
     _permission: 'export configuration'
+
+config.import_full_import_confirm:
+  path: '/admin/config/development/configuration/full/import/confirm'
+  defaults:
+    _form: 'Drupal\config\Form\ConfigImportConfirmForm'
+    _title: 'Confirm configuration import'
+  requirements:
+    _permission: 'import configuration'
diff --git a/core/modules/config/src/Controller/ConfigController.php b/core/modules/config/src/Controller/ConfigController.php
index dc56910..523e365 100644
--- a/core/modules/config/src/Controller/ConfigController.php
+++ b/core/modules/config/src/Controller/ConfigController.php
@@ -156,8 +156,8 @@ public function diff($source_name, $target_name = NULL, $collection = NULL) {
           'dialog-cancel',
         ),
       ),
-      '#title' => "Back to 'Synchronize configuration' page.",
-      '#url' => Url::fromRoute('config.sync'),
+      '#title' => "Back to 'Import configuration' page.",
+      '#url' => Url::fromRoute('config.import_full'),
     );
 
     return $build;
diff --git a/core/modules/config/src/Form/ConfigImportConfirmForm.php b/core/modules/config/src/Form/ConfigImportConfirmForm.php
new file mode 100644
index 0000000..c72866d
--- /dev/null
+++ b/core/modules/config/src/Form/ConfigImportConfirmForm.php
@@ -0,0 +1,265 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\config\Form\ConfigImportConfirmForm.
+ */
+
+namespace Drupal\config\Form;
+
+use Drupal\Core\Config\ConfigImporter;
+use Drupal\Core\Config\ConfigImporterException;
+use Drupal\Core\Config\ConfigManagerInterface;
+use Drupal\Core\Config\TypedConfigManagerInterface;
+use Drupal\Core\Extension\ModuleHandlerInterface;
+use Drupal\Core\Extension\ModuleInstallerInterface;
+use Drupal\Core\Extension\ThemeHandlerInterface;
+use Drupal\Core\Form\ConfirmFormBase;
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\Core\KeyValueStore\KeyValueStoreExpirableInterface;
+use Drupal\Core\Lock\LockBackendInterface;
+use Drupal\Core\Url;
+use Symfony\Component\EventDispatcher\EventDispatcherInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+class ConfigImportConfirmForm extends ConfirmFormBase {
+
+  /**
+   * The database lock object.
+   *
+   * @var \Drupal\Core\Lock\LockBackendInterface
+   */
+  protected $lock;
+
+  /**
+   * Event dispatcher.
+   *
+   * @var \Symfony\Component\EventDispatcher\EventDispatcherInterface
+   */
+  protected $eventDispatcher;
+
+  /**
+   * The configuration manager.
+   *
+   * @var \Drupal\Core\Config\ConfigManagerInterface;
+   */
+  protected $configManager;
+
+  /**
+   * The typed config manager.
+   *
+   * @var \Drupal\Core\Config\TypedConfigManagerInterface
+   */
+  protected $typedConfigManager;
+
+  /**
+   * The module handler.
+   *
+   * @var \Drupal\Core\Extension\ModuleHandlerInterface
+   */
+  protected $moduleHandler;
+
+  /**
+   * The module installer.
+   *
+   * @var \Drupal\Core\Extension\ModuleInstallerInterface
+   */
+  protected $moduleInstaller;
+
+  /**
+   * The theme handler.
+   *
+   * @var \Drupal\Core\Extension\ThemeHandlerInterface
+   */
+  protected $themeHandler;
+
+  /**
+   * The expirable key value store.
+   *
+   * @var \Drupal\Core\KeyValueStore\KeyValueStoreExpirableInterface
+   */
+  protected $keyValueExpirable;
+
+  /**
+   *
+   *
+   * @var \Drupal\Core\Config\StorageComparer
+   */
+  protected $storageComparer;
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getFormId() {
+    return 'config_import_confirm_form';
+  }
+
+  /**
+   * Constructs a ConfigImportConfirmForm object.
+   *
+   * @param \Symfony\Component\EventDispatcher\EventDispatcherInterface $event_dispatcher
+   *   The event dispatcher.
+   */
+  public function __construct(EventDispatcherInterface $event_dispatcher, ConfigManagerInterface $config_manager, LockBackendInterface $lock, TypedConfigManagerInterface $typed_config_manager, ModuleHandlerInterface $module_handler, ModuleInstallerInterface $module_installer, ThemeHandlerInterface $theme_handler, KeyValueStoreExpirableInterface $key_value_expirable) {
+    $this->eventDispatcher = $event_dispatcher;
+    $this->configManager = $config_manager;
+    $this->lock = $lock;
+    $this->typedConfigManager = $typed_config_manager;
+    $this->moduleHandler = $module_handler;
+    $this->moduleInstaller = $module_installer;
+    $this->themeHandler = $theme_handler;
+    $this->keyValueExpirable = $key_value_expirable;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container) {
+    return new static(
+      $container->get('event_dispatcher'),
+      $container->get('config.manager'),
+      $container->get('lock.persistent'),
+      $container->get('config.typed'),
+      $container->get('module_handler'),
+      $container->get('module_installer'),
+      $container->get('theme_handler'),
+      $container->get('keyvalue.expirable')->get('config_import')
+    );
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function buildForm(array $form, FormStateInterface $form_state) {
+    $account = $this->currentUser()->id();
+    $this->storageComparer = $this->keyValueExpirable->get($account);
+    return parent::buildForm($form, $form_state);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function submitForm(array &$form, FormStateInterface $form_state) {
+    $config_importer = new ConfigImporter(
+      $this->storageComparer,
+      $this->eventDispatcher,
+      $this->configManager,
+      $this->lock,
+      $this->typedConfigManager,
+      $this->moduleHandler,
+      $this->moduleInstaller,
+      $this->themeHandler,
+      $this->getStringTranslation()
+    );
+    if ($config_importer->alreadyImporting()) {
+      drupal_set_message($this->t('Another request may be synchronizing configuration already.'));
+    }
+    else {
+      try {
+        $sync_steps = $config_importer->initialize();
+        $batch = array(
+          'operations' => array(),
+          'finished' => array(get_class($this), 'finishBatch'),
+          'title' => t('Synchronizing configuration'),
+          'init_message' => t('Starting configuration synchronization.'),
+          'progress_message' => t('Completed @current step of @total.'),
+          'error_message' => t('Configuration synchronization has encountered an error.'),
+          'file' => drupal_get_path('module', 'config') . '/config.admin.inc',
+        );
+        foreach ($sync_steps as $sync_step) {
+          $batch['operations'][] = array(
+            array(get_class($this), 'processBatch'),
+            array($config_importer, $sync_step),
+          );
+        }
+
+        batch_set($batch);
+        $form_state->setRedirect('config.import_full');
+      }
+      catch (ConfigImporterException $e) {
+        // There are validation errors.
+        drupal_set_message($this->t('The configuration cannot be imported because it failed validation for the following reasons:'), 'error');
+        foreach ($config_importer->getErrors() as $message) {
+          drupal_set_message($message, 'error');
+        }
+      }
+    }
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getQuestion() {
+    return t('Confirm configuration import');
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getConfirmText() {
+    return $this->t('Import');
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getCancelUrl() {
+    return new Url('config.import_full');
+  }
+
+  /**
+   * Processes the config import batch and persists the importer.
+   *
+   * @param \Drupal\Core\Config\ConfigImporter $config_importer
+   *   The batch config importer object to persist.
+   * @param string $sync_step
+   *   The synchronization step to do.
+   * @param array $context
+   *   The batch context.
+   */
+  public static function processBatch(ConfigImporter $config_importer, $sync_step, &$context) {
+    if (!isset($context['sandbox']['config_importer'])) {
+      $context['sandbox']['config_importer'] = $config_importer;
+    }
+
+    $config_importer = $context['sandbox']['config_importer'];
+    $config_importer->doSyncStep($sync_step, $context);
+    if ($errors = $config_importer->getErrors()) {
+      if (!isset($context['results']['errors'])) {
+        $context['results']['errors'] = array();
+      }
+      $context['results']['errors'] += $errors;
+    }
+  }
+
+  /**
+   * Finish batch.
+   *
+   * This function is a static function to avoid serializing the ConfigSync
+   * object unnecessarily.
+   */
+  public static function finishBatch($success, $results, $operations) {
+    if ($success) {
+      if (!empty($results['errors'])) {
+        foreach ($results['errors'] as $error) {
+          drupal_set_message($error, 'error');
+          \Drupal::logger('config_sync')->error($error);
+        }
+        drupal_set_message(\Drupal::translation()->translate('The configuration was imported with errors.'), 'warning');
+      }
+      else {
+        drupal_set_message(\Drupal::translation()->translate('The configuration was imported successfully.'));
+      }
+    }
+    else {
+      // An error occurred.
+      // $operations contains the operations that remained unprocessed.
+      $error_operation = reset($operations);
+      $message = \Drupal::translation()->translate('An error occurred while processing %error_operation with arguments: @arguments', array(
+        '%error_operation' => $error_operation[0],
+        '@arguments' => print_r($error_operation[1], TRUE),
+      ));
+      drupal_set_message($message, 'error');
+    }
+  }
+}
diff --git a/core/modules/config/src/Form/ConfigImportForm.php b/core/modules/config/src/Form/ConfigImportForm.php
index 7b29e3f..4728fef 100644
--- a/core/modules/config/src/Form/ConfigImportForm.php
+++ b/core/modules/config/src/Form/ConfigImportForm.php
@@ -9,8 +9,12 @@
 
 use Drupal\Core\Archiver\ArchiveTar;
 use Drupal\Core\Config\StorageInterface;
+use Drupal\Core\Config\ConfigManagerInterface;
 use Drupal\Core\Form\FormBase;
 use Drupal\Core\Form\FormStateInterface;
+use Drupal\Core\Config\StorageComparer;
+use Drupal\Core\KeyValueStore\KeyValueStoreExpirableInterface;
+use Drupal\Core\Url;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 
 /**
@@ -26,13 +30,46 @@ class ConfigImportForm extends FormBase {
   protected $configStorage;
 
   /**
+   * The staging configuration object.
+   *
+   * @var \Drupal\Core\Config\StorageInterface
+   */
+  protected $stagingStorage;
+
+  /**
+   * The active configuration object.
+   *
+   * @var \Drupal\Core\Config\StorageInterface
+   */
+  protected $activeStorage;
+
+  /**
+   * The snapshot configuration object.
+   *
+   * @var \Drupal\Core\Config\StorageInterface
+   */
+  protected $snapshotStorage;
+
+  /**
+   * The configuration manager.
+   *
+   * @var \Drupal\Core\Config\ConfigManagerInterface;
+   */
+  protected $configManager;
+
+  /**
    * Constructs a new ConfigImportForm.
    *
    * @param \Drupal\Core\Config\StorageInterface $config_storage
    *   The configuration storage.
    */
-  public function __construct(StorageInterface $config_storage) {
+  public function __construct(StorageInterface $staging_storage, StorageInterface $active_storage, StorageInterface $snapshot_storage, StorageInterface $config_storage, ConfigManagerInterface $config_manager, KeyValueStoreExpirableInterface $key_value_expirable) {
+    $this->stagingStorage = $staging_storage;
+    $this->activeStorage = $active_storage;
+    $this->snapshotStorage = $snapshot_storage;
     $this->configStorage = $config_storage;
+    $this->configManager = $config_manager;
+    $this->keyValueExpirable = $key_value_expirable;
   }
 
   /**
@@ -40,7 +77,12 @@ public function __construct(StorageInterface $config_storage) {
    */
   public static function create(ContainerInterface $container) {
     return new static(
-      $container->get('config.storage.staging')
+      $container->get('config.storage.staging'),
+      $container->get('config.storage'),
+      $container->get('config.storage.snapshot'),
+      $container->get('config.storage.staging'),
+      $container->get('config.manager'),
+      $container->get('keyvalue.expirable')->get('config_import')
     );
   }
 
@@ -65,6 +107,142 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       '#type' => 'submit',
       '#value' => $this->t('Upload'),
     );
+
+    $source_list = $this->stagingStorage->listAll();
+    $storage_comparer = new StorageComparer($this->stagingStorage, $this->activeStorage, $this->configManager);
+    if (empty($source_list) || !$storage_comparer->createChangelist()->hasChanges()) {
+      $form['no_changes'] = array(
+        '#type' => 'table',
+        '#header' => array('Name', 'Operations'),
+        '#rows' => array(),
+        '#empty' => $this->t('There are no configuration changes to import.'),
+      );
+      $form['actions']['#access'] = FALSE;
+      return $form;
+    }
+    elseif (!$storage_comparer->validateSiteUuid()) {
+      drupal_set_message($this->t('The staged configuration cannot be imported, because it originates from a different site than this site. You can only synchronize configuration between cloned instances of this site.'), 'error');
+      $form['actions']['#access'] = FALSE;
+      return $form;
+    }
+
+    if ($this->snapshotStorage->exists('core.extension')) {
+      $snapshot_comparer = new StorageComparer($this->activeStorage, $this->snapshotStorage, $this->configManager);
+      if (!$form_state->getUserInput() && $snapshot_comparer->createChangelist()->hasChanges()) {
+        $change_list = array();
+        foreach ($snapshot_comparer->getAllCollectionNames() as $collection) {
+          foreach ($snapshot_comparer->getChangelist(NULL, $collection) as $config_names) {
+            if (empty($config_names)) {
+              continue;
+            }
+            foreach ($config_names as $config_name) {
+              $change_list[] = $config_name;
+            }
+          }
+        }
+        sort($change_list);
+        $change_list_render = array(
+          '#theme' => 'item_list',
+          '#items' => $change_list,
+        );
+        $change_list_html = drupal_render($change_list_render);
+        drupal_set_message($this->t('The following items in your active configuration have changes since the last import that may be lost on the next import. !changes', array('!changes' => $change_list_html)), 'warning');
+      }
+    }
+
+    // Store the comparer for use in the submit.
+    $form_state->set('storage_comparer', $storage_comparer);
+
+    // Add the AJAX library to the form for dialog support.
+    $form['#attached']['library'][] = 'core/drupal.ajax';
+
+    foreach ($storage_comparer->getAllCollectionNames() as $collection) {
+      if ($collection != StorageInterface::DEFAULT_COLLECTION) {
+        $form[$collection]['collection_heading'] = array(
+          '#type' => 'html_tag',
+          '#tag' => 'h2',
+          '#value' => $this->t('!collection configuration collection', array('!collection' => $collection)),
+        );
+      }
+      foreach ($storage_comparer->getChangelist(NULL, $collection) as $config_change_type => $config_names) {
+        if (empty($config_names)) {
+          continue;
+        }
+
+        // @todo A table caption would be more appropriate, but does not have
+        //   the visual importance of a heading.
+        $form[$collection][$config_change_type]['heading'] = array(
+          '#type' => 'html_tag',
+          '#tag' => 'h3',
+        );
+        switch ($config_change_type) {
+          case 'create':
+            $form[$collection][$config_change_type]['heading']['#value'] = $this->formatPlural(count($config_names), '@count new', '@count new');
+            break;
+
+          case 'update':
+            $form[$collection][$config_change_type]['heading']['#value'] = $this->formatPlural(count($config_names), '@count changed', '@count changed');
+            break;
+
+          case 'delete':
+            $form[$collection][$config_change_type]['heading']['#value'] = $this->formatPlural(count($config_names), '@count removed', '@count removed');
+            break;
+
+          case 'rename':
+            $form[$collection][$config_change_type]['heading']['#value'] = $this->formatPlural(count($config_names), '@count renamed', '@count renamed');
+            break;
+        }
+        $form[$collection][$config_change_type]['list'] = array(
+          '#type' => 'table',
+          '#header' => array('Name', 'Operations'),
+        );
+
+        foreach ($config_names as $config_name) {
+          if ($config_change_type == 'rename') {
+            $names = $storage_comparer->extractRenameNames($config_name);
+            $route_options = array('source_name' => $names['old_name'], 'target_name' => $names['new_name']);
+            $config_name = $this->t('!source_name to !target_name', array('!source_name' => $names['old_name'], '!target_name' => $names['new_name']));
+          }
+          else {
+            $route_options = array('source_name' => $config_name);
+          }
+          if ($collection != StorageInterface::DEFAULT_COLLECTION) {
+            $route_name = 'config.diff_collection';
+            $route_options['collection'] = $collection;
+          }
+          else {
+            $route_name = 'config.diff';
+          }
+          $links['view_diff'] = array(
+            'title' => $this->t('View differences'),
+            'url' => Url::fromRoute($route_name, $route_options),
+            'attributes' => array(
+              'class' => array('use-ajax'),
+              'data-dialog-type' => 'modal',
+              'data-dialog-options' => json_encode(array(
+                'width' => 700,
+              )),
+            ),
+          );
+          $form[$collection][$config_change_type]['list']['#rows'][] = array(
+            'name' => $config_name,
+            'operations' => array(
+              'data' => array(
+                '#type' => 'operations',
+                '#links' => $links,
+              ),
+            ),
+          );
+        }
+      }
+    }
+
+    $form['import'] = array(
+      '#type' => 'submit',
+      '#value' => $this->t('Import all'),
+    );
+
+
     return $form;
   }
 
@@ -72,12 +250,14 @@ public function buildForm(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function validateForm(array &$form, FormStateInterface $form_state) {
-    $file_upload = $this->getRequest()->files->get('files[import_tarball]', NULL, TRUE);
-    if ($file_upload && $file_upload->isValid()) {
-      $form_state->setValue('import_tarball', $file_upload->getRealPath());
-    }
-    else {
-      $form_state->setErrorByName('import_tarball', $this->t('The file could not be uploaded.'));
+    if ($form_state->getValue('op') == t('Upload')) {
+      $file_upload = $this->getRequest()->files->get('files[import_tarball]', NULL, TRUE);
+      if ($file_upload && $file_upload->isValid()) {
+        $form_state->setValue('import_tarball', $file_upload->getRealPath());
+      }
+      else {
+        $form_state->setErrorByName('import_tarball', $this->t('The file could not be uploaded.'));
+      }
     }
   }
 
@@ -85,24 +265,32 @@ public function validateForm(array &$form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function submitForm(array &$form, FormStateInterface $form_state) {
-    if ($path = $form_state->getValue('import_tarball')) {
-      $this->configStorage->deleteAll();
-      try {
-        $archiver = new ArchiveTar($path, 'gz');
-        $files = array();
-        foreach ($archiver->listContent() as $file) {
-          $files[] = $file['filename'];
+    if ($form_state->getValue('op') == t('Upload')) {
+      if ($path = $form_state->getValue('import_tarball')) {
+        $this->configStorage->deleteAll();
+        try {
+          $archiver = new ArchiveTar($path, 'gz');
+          $files = array();
+          foreach ($archiver->listContent() as $file) {
+            $files[] = $file['filename'];
+          }
+          $archiver->extractList($files, config_get_config_directory(CONFIG_STAGING_DIRECTORY));
+          drupal_set_message($this->t('Your configuration files were successfully uploaded and are ready for import.'));
+          $form_state->setRedirect('config.import_full');
         }
-        $archiver->extractList($files, config_get_config_directory(CONFIG_STAGING_DIRECTORY));
-        drupal_set_message($this->t('Your configuration files were successfully uploaded and are ready for import.'));
-        $form_state->setRedirect('config.sync');
-      }
-      catch (\Exception $e) {
-        drupal_set_message($this->t('Could not extract the contents of the tar file. The error message is <em>@message</em>', array('@message' => $e->getMessage())), 'error');
+        catch (\Exception $e) {
+          drupal_set_message($this->t('Could not extract the contents of the tar file. The error message is <em>@message</em>', array('@message' => $e->getMessage())), 'error');
+        }
+        drupal_unlink($path);
       }
-      drupal_unlink($path);
     }
-  }
+    else {
+      $account = $this->currentUser()->id();
+      $this->keyValueExpirable->setWithExpire($account, $form_state->get('storage_comparer'), 60);
 
+      // Redirect to the confirmation form.
+      $form_state->setRedirect('config.import_full_import_confirm');
+      return;
+    }
+  }
 }
-
diff --git a/core/modules/config/src/Form/ConfigSync.php b/core/modules/config/src/Form/ConfigSync.php
deleted file mode 100644
index 2c71254..0000000
--- a/core/modules/config/src/Form/ConfigSync.php
+++ /dev/null
@@ -1,406 +0,0 @@
-<?php
-
-/**
- * @file
- * Contains \Drupal\config\Form\ConfigSync.
- */
-
-namespace Drupal\config\Form;
-
-use Drupal\Component\Uuid\UuidInterface;
-use Drupal\Core\Config\ConfigImporterException;
-use Drupal\Core\Config\ConfigImporter;
-use Drupal\Core\Config\TypedConfigManagerInterface;
-use Drupal\Core\Entity\EntityManagerInterface;
-use Drupal\Core\Extension\ModuleHandlerInterface;
-use Drupal\Core\Extension\ModuleInstallerInterface;
-use Drupal\Core\Extension\ThemeHandlerInterface;
-use Drupal\Core\Config\ConfigManagerInterface;
-use Drupal\Core\Form\FormBase;
-use Drupal\Core\Config\StorageInterface;
-use Drupal\Core\Form\FormStateInterface;
-use Drupal\Core\Lock\LockBackendInterface;
-use Drupal\Core\Config\StorageComparer;
-use Drupal\Core\Url;
-use Symfony\Component\EventDispatcher\EventDispatcherInterface;
-use Symfony\Component\DependencyInjection\ContainerInterface;
-
-/**
- * Construct the storage changes in a configuration synchronization form.
- */
-class ConfigSync extends FormBase {
-
-  /**
-   * The database lock object.
-   *
-   * @var \Drupal\Core\Lock\LockBackendInterface
-   */
-  protected $lock;
-
-  /**
-   * The staging configuration object.
-   *
-   * @var \Drupal\Core\Config\StorageInterface
-   */
-  protected $stagingStorage;
-
-  /**
-   * The active configuration object.
-   *
-   * @var \Drupal\Core\Config\StorageInterface
-   */
-  protected $activeStorage;
-
-  /**
-   * The snapshot configuration object.
-   *
-   * @var \Drupal\Core\Config\StorageInterface
-   */
-  protected $snapshotStorage;
-
-  /**
-   * Event dispatcher.
-   *
-   * @var \Symfony\Component\EventDispatcher\EventDispatcherInterface
-   */
-  protected $eventDispatcher;
-
-  /**
-   * The configuration manager.
-   *
-   * @var \Drupal\Core\Config\ConfigManagerInterface;
-   */
-  protected $configManager;
-
-  /**
-   * The typed config manager.
-   *
-   * @var \Drupal\Core\Config\TypedConfigManagerInterface
-   */
-  protected $typedConfigManager;
-
-  /**
-   * The module handler.
-   *
-   * @var \Drupal\Core\Extension\ModuleHandlerInterface
-   */
-  protected $moduleHandler;
-
-  /**
-   * The theme handler.
-   *
-   * @var \Drupal\Core\Extension\ThemeHandlerInterface
-   */
-  protected $themeHandler;
-
-  /**
-   * The module installer.
-   *
-   * @var \Drupal\Core\Extension\ModuleInstallerInterface
-   */
-  protected $moduleInstaller;
-
-  /**
-   * Constructs the object.
-   *
-   * @param \Drupal\Core\Config\StorageInterface $staging_storage
-   *   The source storage.
-   * @param \Drupal\Core\Config\StorageInterface $active_storage
-   *   The target storage.
-   * @param \Drupal\Core\Config\StorageInterface $snapshot_storage
-   *   The snapshot storage.
-   * @param \Drupal\Core\Lock\LockBackendInterface $lock
-   *   The lock object.
-   * @param \Symfony\Component\EventDispatcher\EventDispatcherInterface $event_dispatcher
-   *   Event dispatcher.
-   * @param \Drupal\Core\Config\ConfigManagerInterface $config_manager
-   *   Configuration manager.
-   * @param \Drupal\Core\Config\TypedConfigManagerInterface $typed_config
-   *   The typed configuration manager.
-   * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
-   *   The module handler.
-   * @param \Drupal\Core\Extension\ModuleInstallerInterface $module_installer
-   *   The module installer.
-   * @param \Drupal\Core\Extension\ThemeHandlerInterface $theme_handler
-   *   The theme handler.
-   */
-  public function __construct(StorageInterface $staging_storage, StorageInterface $active_storage, StorageInterface $snapshot_storage, LockBackendInterface $lock, EventDispatcherInterface $event_dispatcher, ConfigManagerInterface $config_manager, TypedConfigManagerInterface $typed_config, ModuleHandlerInterface $module_handler, ModuleInstallerInterface $module_installer, ThemeHandlerInterface $theme_handler) {
-    $this->stagingStorage = $staging_storage;
-    $this->activeStorage = $active_storage;
-    $this->snapshotStorage = $snapshot_storage;
-    $this->lock = $lock;
-    $this->eventDispatcher = $event_dispatcher;
-    $this->configManager = $config_manager;
-    $this->typedConfigManager = $typed_config;
-    $this->moduleHandler = $module_handler;
-    $this->moduleInstaller = $module_installer;
-    $this->themeHandler = $theme_handler;
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public static function create(ContainerInterface $container) {
-    return new static(
-      $container->get('config.storage.staging'),
-      $container->get('config.storage'),
-      $container->get('config.storage.snapshot'),
-      $container->get('lock.persistent'),
-      $container->get('event_dispatcher'),
-      $container->get('config.manager'),
-      $container->get('config.typed'),
-      $container->get('module_handler'),
-      $container->get('module_installer'),
-      $container->get('theme_handler')
-    );
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function getFormId() {
-    return 'config_admin_import_form';
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function buildForm(array $form, FormStateInterface $form_state) {
-    $form['actions'] = array('#type' => 'actions');
-    $form['actions']['submit'] = array(
-      '#type' => 'submit',
-      '#value' => $this->t('Import all'),
-    );
-    $source_list = $this->stagingStorage->listAll();
-    $storage_comparer = new StorageComparer($this->stagingStorage, $this->activeStorage, $this->configManager);
-    if (empty($source_list) || !$storage_comparer->createChangelist()->hasChanges()) {
-      $form['no_changes'] = array(
-        '#type' => 'table',
-        '#header' => array('Name', 'Operations'),
-        '#rows' => array(),
-        '#empty' => $this->t('There are no configuration changes to import.'),
-      );
-      $form['actions']['#access'] = FALSE;
-      return $form;
-    }
-    elseif (!$storage_comparer->validateSiteUuid()) {
-      drupal_set_message($this->t('The staged configuration cannot be imported, because it originates from a different site than this site. You can only synchronize configuration between cloned instances of this site.'), 'error');
-      $form['actions']['#access'] = FALSE;
-      return $form;
-    }
-    // A list of changes will be displayed, so check if the user should be
-    // warned of potential losses to configuration.
-    if ($this->snapshotStorage->exists('core.extension')) {
-      $snapshot_comparer = new StorageComparer($this->activeStorage, $this->snapshotStorage, $this->configManager);
-      if (!$form_state->getUserInput() && $snapshot_comparer->createChangelist()->hasChanges()) {
-        $change_list = array();
-        foreach ($snapshot_comparer->getAllCollectionNames() as $collection) {
-          foreach ($snapshot_comparer->getChangelist(NULL, $collection) as $config_names) {
-            if (empty($config_names)) {
-              continue;
-            }
-            foreach ($config_names as $config_name) {
-              $change_list[] = $config_name;
-            }
-          }
-        }
-        sort($change_list);
-        $change_list_render = array(
-          '#theme' => 'item_list',
-          '#items' => $change_list,
-        );
-        $change_list_html = drupal_render($change_list_render);
-        drupal_set_message($this->t('The following items in your active configuration have changes since the last import that may be lost on the next import. !changes', array('!changes' => $change_list_html)), 'warning');
-      }
-    }
-
-    // Store the comparer for use in the submit.
-    $form_state->set('storage_comparer', $storage_comparer);
-
-    // Add the AJAX library to the form for dialog support.
-    $form['#attached']['library'][] = 'core/drupal.ajax';
-
-    foreach ($storage_comparer->getAllCollectionNames() as $collection) {
-      if ($collection != StorageInterface::DEFAULT_COLLECTION) {
-        $form[$collection]['collection_heading'] = array(
-          '#type' => 'html_tag',
-          '#tag' => 'h2',
-          '#value' => $this->t('!collection configuration collection', array('!collection' => $collection)),
-        );
-      }
-      foreach ($storage_comparer->getChangelist(NULL, $collection) as $config_change_type => $config_names) {
-        if (empty($config_names)) {
-          continue;
-        }
-
-        // @todo A table caption would be more appropriate, but does not have the
-        //   visual importance of a heading.
-        $form[$collection][$config_change_type]['heading'] = array(
-          '#type' => 'html_tag',
-          '#tag' => 'h3',
-        );
-        switch ($config_change_type) {
-          case 'create':
-            $form[$collection][$config_change_type]['heading']['#value'] = $this->formatPlural(count($config_names), '@count new', '@count new');
-            break;
-
-          case 'update':
-            $form[$collection][$config_change_type]['heading']['#value'] = $this->formatPlural(count($config_names), '@count changed', '@count changed');
-            break;
-
-          case 'delete':
-            $form[$collection][$config_change_type]['heading']['#value'] = $this->formatPlural(count($config_names), '@count removed', '@count removed');
-            break;
-
-          case 'rename':
-            $form[$collection][$config_change_type]['heading']['#value'] = $this->formatPlural(count($config_names), '@count renamed', '@count renamed');
-            break;
-        }
-        $form[$collection][$config_change_type]['list'] = array(
-          '#type' => 'table',
-          '#header' => array('Name', 'Operations'),
-        );
-
-        foreach ($config_names as $config_name) {
-          if ($config_change_type == 'rename') {
-            $names = $storage_comparer->extractRenameNames($config_name);
-            $route_options = array('source_name' => $names['old_name'], 'target_name' => $names['new_name']);
-            $config_name = $this->t('!source_name to !target_name', array('!source_name' => $names['old_name'], '!target_name' => $names['new_name']));
-          }
-          else {
-            $route_options = array('source_name' => $config_name);
-          }
-          if ($collection != StorageInterface::DEFAULT_COLLECTION) {
-            $route_name = 'config.diff_collection';
-            $route_options['collection'] = $collection;
-          }
-          else {
-            $route_name = 'config.diff';
-          }
-          $links['view_diff'] = array(
-            'title' => $this->t('View differences'),
-            'url' => Url::fromRoute($route_name, $route_options),
-            'attributes' => array(
-              'class' => array('use-ajax'),
-              'data-dialog-type' => 'modal',
-              'data-dialog-options' => json_encode(array(
-                'width' => 700
-              )),
-            ),
-          );
-          $form[$collection][$config_change_type]['list']['#rows'][] = array(
-            'name' => $config_name,
-            'operations' => array(
-              'data' => array(
-                '#type' => 'operations',
-                '#links' => $links,
-              ),
-            ),
-          );
-        }
-      }
-    }
-    return $form;
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function submitForm(array &$form, FormStateInterface $form_state) {
-    $config_importer = new ConfigImporter(
-      $form_state->get('storage_comparer'),
-      $this->eventDispatcher,
-      $this->configManager,
-      $this->lock,
-      $this->typedConfigManager,
-      $this->moduleHandler,
-      $this->moduleInstaller,
-      $this->themeHandler,
-      $this->getStringTranslation()
-    );
-    if ($config_importer->alreadyImporting()) {
-      drupal_set_message($this->t('Another request may be synchronizing configuration already.'));
-    }
-    else{
-      try {
-        $sync_steps = $config_importer->initialize();
-        $batch = array(
-          'operations' => array(),
-          'finished' => array(get_class($this), 'finishBatch'),
-          'title' => t('Synchronizing configuration'),
-          'init_message' => t('Starting configuration synchronization.'),
-          'progress_message' => t('Completed @current step of @total.'),
-          'error_message' => t('Configuration synchronization has encountered an error.'),
-          'file' => drupal_get_path('module', 'config') . '/config.admin.inc',
-        );
-        foreach ($sync_steps as $sync_step) {
-          $batch['operations'][] = array(array(get_class($this), 'processBatch'), array($config_importer, $sync_step));
-        }
-
-        batch_set($batch);
-      }
-      catch (ConfigImporterException $e) {
-        // There are validation errors.
-        drupal_set_message($this->t('The configuration cannot be imported because it failed validation for the following reasons:'), 'error');
-        foreach ($config_importer->getErrors() as $message) {
-          drupal_set_message($message, 'error');
-        }
-      }
-    }
-  }
-
-  /**
-   * Processes the config import batch and persists the importer.
-   *
-   * @param \Drupal\Core\Config\ConfigImporter $config_importer
-   *   The batch config importer object to persist.
-   * @param string $sync_step
-   *   The synchronization step to do.
-   * @param array $context
-   *   The batch context.
-   */
-  public static function processBatch(ConfigImporter $config_importer, $sync_step, &$context) {
-    if (!isset($context['sandbox']['config_importer'])) {
-      $context['sandbox']['config_importer'] = $config_importer;
-    }
-
-    $config_importer = $context['sandbox']['config_importer'];
-    $config_importer->doSyncStep($sync_step, $context);
-    if ($errors = $config_importer->getErrors()) {
-      if (!isset($context['results']['errors'])) {
-        $context['results']['errors'] = array();
-      }
-      $context['results']['errors'] += $errors;
-    }
-  }
-
-  /**
-   * Finish batch.
-   *
-   * This function is a static function to avoid serializing the ConfigSync
-   * object unnecessarily.
-   */
-  public static function finishBatch($success, $results, $operations) {
-    if ($success) {
-      if (!empty($results['errors'])) {
-        foreach ($results['errors'] as $error) {
-          drupal_set_message($error, 'error');
-          \Drupal::logger('config_sync')->error($error);
-        }
-        drupal_set_message(\Drupal::translation()->translate('The configuration was imported with errors.'), 'warning');
-      }
-      else {
-        drupal_set_message(\Drupal::translation()->translate('The configuration was imported successfully.'));
-      }
-    }
-    else {
-      // An error occurred.
-      // $operations contains the operations that remained unprocessed.
-      $error_operation = reset($operations);
-      $message = \Drupal::translation()->translate('An error occurred while processing %error_operation with arguments: @arguments', array('%error_operation' => $error_operation[0], '@arguments' => print_r($error_operation[1], TRUE)));
-      drupal_set_message($message, 'error');
-    }
-  }
-
-
-}
diff --git a/core/modules/config/src/Tests/ConfigExportImportUITest.php b/core/modules/config/src/Tests/ConfigExportImportUITest.php
index 6a63df7..0878ede 100644
--- a/core/modules/config/src/Tests/ConfigExportImportUITest.php
+++ b/core/modules/config/src/Tests/ConfigExportImportUITest.php
@@ -91,7 +91,7 @@ protected function setUp() {
    */
   public function testExportImport() {
     // After installation there is no snapshot and nothing to import.
-    $this->drupalGet('admin/config/development/configuration');
+    $this->drupalGet('admin/config/development/configuration/full/import');
     $this->assertNoText(t('Warning message'));
     $this->assertText(t('There are no configuration changes to import.'));
 
@@ -173,6 +173,11 @@ public function testExportImport() {
     $this->assertText($this->contentType->label());
 
     $this->drupalPostForm(NULL, array(), 'Import all');
+
+    // We now have to confirm the import.
+    $this->assertText(t('This action cannot be undone.'));
+    $this->drupalPostForm('admin/config/development/configuration/full/import/confirm', array(), 'Import');
+
     // After importing the snapshot has been updated an there are no warnings.
     $this->assertNoText(t('Warning message'));
     $this->assertText(t('There are no configuration changes to import.'));
@@ -185,13 +190,13 @@ public function testExportImport() {
     $this->config('system.site')
       ->set('slogan', $this->originalSlogan)
       ->save();
-    $this->drupalGet('admin/config/development/configuration');
+    $this->drupalGet('admin/config/development/configuration/full/import');
     $this->assertText(t('Warning message'));
     $this->assertText('The following items in your active configuration have changes since the last import that may be lost on the next import. system.site');
     // Remove everything from staging. The warning about differences between the
     // active and snapshot should no longer exist.
     \Drupal::service('config.storage.staging')->deleteAll();
-    $this->drupalGet('admin/config/development/configuration');
+    $this->drupalGet('admin/config/development/configuration/full/import');
     $this->assertNoText(t('Warning message'));
     $this->assertNoText('The following items in your active configuration have changes since the last import that may be lost on the next import. system.site');
     $this->assertText(t('There are no configuration changes to import.'));
@@ -203,7 +208,7 @@ public function testExportImport() {
     $data['slogan'] = 'in the face';
     $this->copyConfig($this->container->get('config.storage'), $staging);
     $staging->write('system.site', $data);
-    $this->drupalGet('admin/config/development/configuration');
+    $this->drupalGet('admin/config/development/configuration/full/import');
     $this->assertText(t('Warning message'));
     $this->assertText('The following items in your active configuration have changes since the last import that may be lost on the next import. system.site');
   }
@@ -271,7 +276,7 @@ public function testExportImportCollections() {
 
     $this->drupalPostForm('admin/config/development/configuration/full/import', array('files[import_tarball]' => $filename), 'Upload');
     // Verify that there are configuration differences to import.
-    $this->drupalGet('admin/config/development/configuration');
+    $this->drupalGet('admin/config/development/configuration/full/import');
     $this->assertNoText(t('There are no configuration changes to import.'));
     $this->assertText(t('!collection configuration collection', array('!collection' => 'collection.test1')));
     $this->assertText(t('!collection configuration collection', array('!collection' => 'collection.test2')));
@@ -289,6 +294,11 @@ public function testExportImportCollections() {
     $this->assertLinkByHref('admin/config/development/configuration/sync/diff_collection/collection.test2/config_test.another_delete');
 
     $this->drupalPostForm(NULL, array(), 'Import all');
+
+    // We now have to confirm the import.
+    $this->assertText(t('This action cannot be undone.'));
+    $this->drupalPostForm('admin/config/development/configuration/full/import/confirm', array(), 'Import');
+
     $this->assertText(t('There are no configuration changes to import.'));
 
     // Test data in collections.
diff --git a/core/modules/config/src/Tests/ConfigImportAllTest.php b/core/modules/config/src/Tests/ConfigImportAllTest.php
index 6e1aaea..dd0575b 100644
--- a/core/modules/config/src/Tests/ConfigImportAllTest.php
+++ b/core/modules/config/src/Tests/ConfigImportAllTest.php
@@ -23,7 +23,7 @@ class ConfigImportAllTest extends ModuleTestBase {
   use SchemaCheckTestTrait;
 
   /**
-   * A user with the 'synchronize configuration' permission.
+   * A user with the 'Import configuration' permission.
    *
    * @var \Drupal\user\UserInterface
    */
@@ -41,7 +41,7 @@ class ConfigImportAllTest extends ModuleTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->webUser = $this->drupalCreateUser(array('synchronize configuration'));
+    $this->webUser = $this->drupalCreateUser(array('import configuration'));
     $this->drupalLogin($this->webUser);
   }
 
@@ -129,7 +129,8 @@ public function testInstallUninstall() {
     }
 
     // Import the configuration thereby re-installing all the modules.
-    $this->drupalPostForm('admin/config/development/configuration', array(), t('Import all'));
+    $this->drupalPostForm('admin/config/development/configuration/full/import', array(), t('Import all'));
+    $this->drupalPostForm('admin/config/development/configuration/full/import/confirm', array(), 'Import');
     // Modules have been installed that have services.
     $this->rebuildContainer();
 
diff --git a/core/modules/config/src/Tests/ConfigImportUITest.php b/core/modules/config/src/Tests/ConfigImportUITest.php
index cc36e36..8151a65 100644
--- a/core/modules/config/src/Tests/ConfigImportUITest.php
+++ b/core/modules/config/src/Tests/ConfigImportUITest.php
@@ -26,7 +26,7 @@ class ConfigImportUITest extends WebTestBase {
   public static $modules = array('config', 'config_test', 'config_import_test', 'text', 'options');
 
   /**
-   * A user with the 'synchronize configuration' permission.
+   * A user with the 'Import configuration' permission.
    *
    * @var \Drupal\user\UserInterface
    */
@@ -35,7 +35,7 @@ class ConfigImportUITest extends WebTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->webUser = $this->drupalCreateUser(array('synchronize configuration'));
+    $this->webUser = $this->drupalCreateUser(array('import configuration'));
     $this->drupalLogin($this->webUser);
     $this->copyConfig($this->container->get('config.storage'), $this->container->get('config.storage.staging'));
   }
@@ -49,7 +49,7 @@ function testImport() {
     /** @var \Drupal\Core\Config\StorageInterface $staging */
     $staging = $this->container->get('config.storage.staging');
 
-    $this->drupalGet('admin/config/development/configuration');
+    $this->drupalGet('admin/config/development/configuration/full/import');
     $this->assertText('There are no configuration changes to import.');
     $this->assertNoFieldById('edit-submit', t('Import all'));
 
@@ -113,23 +113,24 @@ function testImport() {
     \Drupal::state()->set('ConfigImportUITest.core.extension.modules_uninstalled', array());
 
     // Verify that both appear as ready to import.
-    $this->drupalGet('admin/config/development/configuration');
+    $this->drupalGet('admin/config/development/configuration/full/import');
     $this->assertRaw('<td>' . $name);
     $this->assertRaw('<td>' . $dynamic_name);
     $this->assertRaw('<td>core.extension');
     $this->assertRaw('<td>system.theme');
     $this->assertRaw('<td>action.settings');
-    $this->assertFieldById('edit-submit', t('Import all'));
+    $this->assertFieldById('edit-import', t('Import all'));
 
     // Import and verify that both do not appear anymore.
     $this->drupalPostForm(NULL, array(), t('Import all'));
+    $this->drupalPostForm('admin/config/development/configuration/full/import/confirm', array(), 'Import');
     $this->assertNoRaw('<td>' . $name);
     $this->assertNoRaw('<td>' . $dynamic_name);
     $this->assertNoRaw('<td>core.extension');
     $this->assertNoRaw('<td>system.theme');
     $this->assertNoRaw('<td>action.settings');
 
-    $this->assertNoFieldById('edit-submit', t('Import all'));
+    $this->assertNoFieldById('edit-import', t('Import all'));
 
     // Verify that there are no further changes to import.
     $this->assertText(t('There are no configuration changes to import.'));
@@ -188,13 +189,14 @@ function testImport() {
     \Drupal::state()->set('ConfigImportUITest.core.extension.modules_uninstalled', array());
 
     // Verify that both appear as ready to import.
-    $this->drupalGet('admin/config/development/configuration');
+    $this->drupalGet('admin/config/development/configuration/full/import');
     $this->assertRaw('<td>core.extension');
     $this->assertRaw('<td>system.theme');
     $this->assertRaw('<td>action.settings');
 
     // Import and verify that both do not appear anymore.
     $this->drupalPostForm(NULL, array(), t('Import all'));
+    $this->drupalPostForm('admin/config/development/configuration/full/import/confirm', array(), 'Import');
     $this->assertNoRaw('<td>core.extension');
     $this->assertNoRaw('<td>system.theme');
     $this->assertNoRaw('<td>action.settings');
@@ -231,7 +233,7 @@ function testImportLock() {
     $this->prepareSiteNameUpdate($new_site_name);
 
     // Verify that there are configuration differences to import.
-    $this->drupalGet('admin/config/development/configuration');
+    $this->drupalGet('admin/config/development/configuration/full/import');
     $this->assertNoText(t('There are no configuration changes to import.'));
 
     // Acquire a fake-lock on the import mechanism.
@@ -261,7 +263,7 @@ function testImportSiteUuidValidation() {
     $staging->write('system.site', $config_data);
 
     // Verify that there are configuration differences to import.
-    $this->drupalGet('admin/config/development/configuration');
+    $this->drupalGet('admin/config/development/configuration/full/import');
     $this->assertText(t('The staged configuration cannot be imported, because it originates from a different site than this site. You can only synchronize configuration between cloned instances of this site.'));
     $this->assertNoFieldById('edit-submit', t('Import all'));
   }
@@ -321,7 +323,7 @@ public function testImportValidation() {
     $new_site_name = 'Config import test ' . $this->randomString();
     $this->prepareSiteNameUpdate($new_site_name);
 
-    $this->drupalGet('admin/config/development/configuration');
+    $this->drupalGet('admin/config/development/configuration/full/import');
     $this->assertNoText(t('There are no configuration changes to import.'));
     $this->drupalPostForm(NULL, array(), t('Import all'));
 
diff --git a/core/modules/config/tests/src/Unit/Menu/ConfigLocalTasksTest.php b/core/modules/config/tests/src/Unit/Menu/ConfigLocalTasksTest.php
index 1da4148..670191b 100644
--- a/core/modules/config/tests/src/Unit/Menu/ConfigLocalTasksTest.php
+++ b/core/modules/config/tests/src/Unit/Menu/ConfigLocalTasksTest.php
@@ -35,11 +35,10 @@ public function testConfigAdminLocalTasks($route, $expected) {
    */
   public function getConfigAdminRoutes() {
     return array(
-      array('config.sync', array(array('config.sync', 'config.full', 'config.single'))),
-      array('config.export_full', array(array('config.sync', 'config.full', 'config.single'), array('config.export_full', 'config.import_full'))),
-      array('config.import_full', array(array('config.sync', 'config.full', 'config.single'), array('config.export_full', 'config.import_full'))),
-      array('config.export_single', array(array('config.sync', 'config.full', 'config.single'), array('config.export_single', 'config.import_single'))),
-      array('config.import_single', array(array('config.sync', 'config.full', 'config.single'), array('config.export_single', 'config.import_single'))),
+      array('config.import_full', array(array('config.import', 'config.export'), array('config.import_full', 'config.import_single'))),
+      array('config.import_single', array(array('config.import', 'config.export'), array('config.import_full', 'config.import_single'))),
+      array('config.export_full', array(array('config.import', 'config.export'), array('config.export_full', 'config.export_single'))),
+      array('config.export_single', array(array('config.import', 'config.export'), array('config.export_full', 'config.export_single'))),
     );
   }
 
diff --git a/core/modules/field/src/Tests/FieldImportDeleteUninstallUiTest.php b/core/modules/field/src/Tests/FieldImportDeleteUninstallUiTest.php
index de793dd..523d669 100644
--- a/core/modules/field/src/Tests/FieldImportDeleteUninstallUiTest.php
+++ b/core/modules/field/src/Tests/FieldImportDeleteUninstallUiTest.php
@@ -28,7 +28,7 @@ class FieldImportDeleteUninstallUiTest extends FieldTestBase {
   protected function setUp() {
     parent::setUp();
 
-    $this->drupalLogin($this->drupalCreateUser(array('synchronize configuration')));
+    $this->drupalLogin($this->drupalCreateUser(array('import configuration')));
   }
 
   /**
diff --git a/core/modules/node/src/Tests/NodeTypeRenameConfigImportTest.php b/core/modules/node/src/Tests/NodeTypeRenameConfigImportTest.php
index af29bce..81223e7 100644
--- a/core/modules/node/src/Tests/NodeTypeRenameConfigImportTest.php
+++ b/core/modules/node/src/Tests/NodeTypeRenameConfigImportTest.php
@@ -39,7 +39,7 @@ class NodeTypeRenameConfigImportTest extends WebTestBase {
    */
   protected function setUp() {
     parent::setUp();
-    $this->webUser = $this->drupalCreateUser(array('synchronize configuration'));
+    $this->webUser = $this->drupalCreateUser(array('import configuration'));
     $this->drupalLogin($this->webUser);
   }
 
diff --git a/core/modules/options/src/Tests/OptionsFloatFieldImportTest.php b/core/modules/options/src/Tests/OptionsFloatFieldImportTest.php
index 5be5840..c898d06 100644
--- a/core/modules/options/src/Tests/OptionsFloatFieldImportTest.php
+++ b/core/modules/options/src/Tests/OptionsFloatFieldImportTest.php
@@ -29,7 +29,7 @@ protected function setUp() {
     parent::setUp();
 
     // Create test user.
-    $admin_user = $this->drupalCreateUser(array('synchronize configuration', 'access content', 'access administration pages', 'administer site configuration', 'administer content types', 'administer nodes', 'bypass node access', 'administer node fields', 'administer node display'));
+    $admin_user = $this->drupalCreateUser(array('import configuration', 'access content', 'access administration pages', 'administer site configuration', 'administer content types', 'administer nodes', 'bypass node access', 'administer node fields', 'administer node display'));
     $this->drupalLogin($admin_user);
   }
 
diff --git a/sites/default/default.services.yml b/sites/default/default.services.yml
index ecb1c43..c44c73b 100644
--- a/sites/default/default.services.yml
+++ b/sites/default/default.services.yml
@@ -25,9 +25,9 @@ parameters:
     cookie_lifetime: 2000000
     #
     # Drupal automatically generates a unique session cookie name based on the
-    # full domain name used to access the site. This mechanism is sufficient
-    # for most use-cases, including multi-site deployments. However, if it is
-    # desired that a session can be reused across different subdomains, the
+    # full domain name used to access the site. This mechanism is sufficent for
+    # most use-cases, including multi-site deployments. However, if it is
+    # desired that a session can be reused accross different subdomains, the
     # cookie domain needs to be set to the shared base domain. Doing so assures
     # that users remain logged in as they cross between various subdomains.
     # To maximize compatibility and normalize the behavior across user agents,
@@ -51,7 +51,7 @@ parameters:
     #   changes (see auto_reload below).
     #
     # For more information about debugging Twig templates, see
-    # https://www.drupal.org/node/1906392.
+    # http://drupal.org/node/1906392.
     #
     # Not recommended in production environments
     # @default false
diff --git a/sites/default/default.settings.php b/sites/default/default.settings.php
index 330cc56..3783d0a 100644
--- a/sites/default/default.settings.php
+++ b/sites/default/default.settings.php
@@ -22,7 +22,7 @@
  * 'sites/default' will be used.
  *
  * For example, for a fictitious site installed at
- * https://www.drupal.org:8080/mysite/test/, the 'settings.php' file is searched
+ * http://www.drupal.org:8080/mysite/test/, the 'settings.php' file is searched
  * for in the following directories:
  *
  * - sites/8080.www.drupal.org.mysite.test
@@ -44,11 +44,11 @@
  *
  * Note that if you are installing on a non-standard port number, prefix the
  * hostname with that number. For example,
- * https://www.drupal.org:8080/mysite/test/ could be loaded from
+ * http://www.drupal.org:8080/mysite/test/ could be loaded from
  * sites/8080.www.drupal.org.mysite.test/.
  *
  * @see example.sites.php
- * @see \Drupal\Core\DrupalKernel::getSitePath()
+ * @see conf_path()
  *
  * In addition to customizing application settings through variables in
  * settings.php, you can create a services.yml file in the same directory to
@@ -75,7 +75,7 @@
  *   'host' => 'localhost',
  *   'port' => 3306,
  *   'prefix' => 'myprefix_',
- *   'collation' => 'utf8mb4_general_ci',
+ *   'collation' => 'utf8_general_ci',
  * );
  * @endcode
  *
@@ -127,7 +127,7 @@
  *   'password' => 'password',
  *   'host' => 'localhost',
  *   'prefix' => 'main_',
- *   'collation' => 'utf8mb4_general_ci',
+ *   'collation' => 'utf8_general_ci',
  * );
  * @endcode
  *
@@ -287,16 +287,6 @@
 $settings['hash_salt'] = '';
 
 /**
- * Deployment identifier.
- *
- * Drupal's dependency injection container will be automatically invalidated and
- * rebuilt when the Drupal core version changes. When updating contributed or
- * custom code that changes the container, changing this identifier will also
- * allow the container to be invalidated as soon as code is deployed.
- */
-# $settings['deployment_identifier'] = \Drupal::VERSION;
-
-/**
  * Access control for update.php script.
  *
  * If you are updating your Drupal installation using the update.php script but
@@ -440,7 +430,7 @@
  * the code directly via SSH or FTP themselves. This setting completely
  * disables all functionality related to these authorized file operations.
  *
- * @see https://www.drupal.org/node/244924
+ * @see http://drupal.org/node/244924
  *
  * Remove the leading hash signs to disable.
  */
@@ -473,8 +463,8 @@
  * Note: Caches need to be cleared when this value is changed to make the
  * private:// stream wrapper available to the system.
  *
- * See https://www.drupal.org/documentation/modules/file for more information
- * about securing private files.
+ * See http://drupal.org/documentation/modules/file for more information about
+ * securing private files.
  */
 # $settings['file_private_path'] = '';
 
